Is having two relationships wrong? Is it necessary to get physical in a relationship?

Question - Gurudev, is having two relationships wrong? Is it necessary to get physical in a relationship?

Gurudev Sri Sri - Listen, would you like your spouse, or boyfriend, or girlfriend to have two relationships? First you answer that. What you are doing, would you like someone else to do the same thing to you? Can you accept it? Your mind will say no, right? It is better to be loyal in one relationship. It is no good to hurt two people at the same time.